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<br />Proiects at Soecific Locations <br /> <br />Windy Gulch Culvert <br />The hydrology of Windy Gulch is somewhat uncertain. However, using the best current <br />hydrologic estimate, a 12- foot wide by 12- foot high culvert would be required to pass a 100-year <br />flood. This size is not feasible given the culvert location. Therefore, an overflow system was <br />proposed to safely pass water that overflows the culvert over the roadway to Willow Creek. <br /> <br />The roadway could be raised 2 foot on both sides of a concrete overflow pan. The steeper slopes <br />and dip will create an awkward road design, but vehicles should still be able to maneuver <br />satisfactorily over the area. The current culvert could be replaced with a 6-foot wide by 2-foot <br />high box culvert to pass small floods without blocking the Bachelor Loop Road and access to <br />upstream locations except during exceptionally high floods. <br /> <br />Topographic re-design of the area would also allow for a short raising and continuation of the <br />Army Corps levees for the flume entrance. This will allow the freeboard of the 100-year flood in <br />Willow Creek to be raised from less than 3 foot at the tip of the levees to above 3 foot at all <br />locations within the flume forebay. Therefore, the project should protect downtown Creede from <br />upstream flooding by Windy Gulch at the 100-year level and should also help meet the Army <br />Corps 100-year flood 3-foot freeboard requirements in Willow Creek. The project should cost <br />roughly $60,000. <br /> <br />Mining Museum Area Restoration <br />A comprehensive project to restore the stream reach above the entrance to the masonry flume in <br />the wider floodplain area near the mining museum was proposed to address multiple problems <br />and opportunities. A project was envisioned to control flooding of the mining museum area and <br />fire department tunnels and lower the transport of sediments into the masonry flume. The <br />control of downstream sedimentation could be very important to the success of the "sinuous" <br />stream channel restoration that is being considered below the flume downstream of Creede. The <br />project could also enhance the visual, aesthetic, stream habitat, and recreational values of the <br />area. A restoration design was proposed that was intended to be a first step to a final restoration <br />design of the reach. <br /> <br />The design would remove the angled earthen weir and replace it with a shorter, more <br />perpendicular weir that would maintain flow depth at low flows while safely passing flood flows. <br />Permanent water level sedimentation basins would be excavated upstream of the weir, and <br />upstream of flume into a current drainage pond. Two large boulder drops were envisioned to <br />create waterfalls into both of the sedimentation basins. <br /> <br />The main channel would be reshaped to create a more natural flow line and meander for the <br />stream. The current large depression to the east of the roadway would be filled to create channel <br />contouring and remove the reliance on push up levees. The stream reach was designed to have a <br />2% channel slope. This is within the slope range for a Rosgen B3 type channel that is probably <br />most appropriate in this location. A relatively narrow main channel was designed to maintain <br />depth at low flows, but a wider floodplain area was designed within the channel area that would <br />safely accept flood flows and lower shear stresses at high flows. <br /> <br />VI <br />